Multiple choice By what time CST will be abolished altogether by the Central Government? April 1, 2008 April 1, 2009 January 1, 2010 March 31, 2010 Reveal answer Fill a bubble to check yourself D Correct answer Explanation The Central Sales Tax (CST) was phased out as part of the transition to the Goods and Services Tax (GST) regime, with March 31, 2010, being a significant target date in that process.